Safety device for presses



Se t. p zo 1927 E. sEcoR SAFETY DEVICE FOR PRESSES Filed Aug '7. 192s injury.

Pau-med sept. 2o, 1927.

EZEA SECOR, OF ST. JOSEPH, MCHIGAN.

SAFETY DEVICE FCB PRESSES. i

Application .filed August 7, 1926. Serial No. 127,355.

rlhis invention has for its object the vpro-l vision ci a simple, inexpensive and easily applied device whereby the operator oi:l a punching press or like machine will be guarded against injury to his hands, and the work removed at each operation oiu the machine without exposing the operator to The invention provides a device which may be applied to any machine having a reciprocating working part, may be easily adjusted to the requirements of any particular case, and will operate -in a highly eiicient manner inv use. The invention is illustrated in the accompanying drawing and will be hereinafter fully described, the novel features being subsequently particularly pointed out in the appended claims.

In'the drawing:

e Figure 1 is a perspective view of my safety device illustrating the application of the saine;

Fig. 2 is a plan view of the adjustable guide, and

Fig. 3 is adetail plan view of the arm supporting the said guide.

In carrying out the invention, I provide a standard or post 1 which is preferably a flat bar having a. lateral foot 2 at its lower end adapted to be bolted to the bed plate of a punching press or other machine. A bracket 3 is carried by this post or standard, and a slot- 4 is formed in the standard to permit the bracket to be adjusted vertically as may be necessary to iit the device to any particular machine. The bracket is firmly secured in place by set bolts 5 inserted through the slot 4 into the bracket, as shown in Fig. 1. A lateral toot 6 is formed at the lower end of the bracket 3 and at the upper end of the same a cap or angle bracket i' is secured, the said cap and the foot 6 being providedwith circular openings to receive the pivot studs 8 formed at the ends of a strap or flat bar 9 having a helical bend 10 in its upper portion. To the lower end of the strap or bar 9 is secured the laterally projecting flat blade or pusher 11 which is preferably formed of resilient metal and may be of any desired length. Fitting around the strap 9 is an annulus 12 having a radial slot 13 therein and formed at the end of an arm 14, said arm being alined with the said slot 13, as shown clearly in Fig. 3. The arm 14 is bolted to the foot 15 at the lower end of an attaching plate 16 which rises vertically and is provided in its upper portion -ing part oft any lother machine.

strap 9 and the arcuate slots 21 permit the disk' to be adj usted to the twist in the strap so that tlie resulting rotation will be impart-` ed to tie strap at therproperupoi-nt in the operatlon ot' the machine. llhe slot 13y and the open end ot the slot 2OS permit -tlierana I nulus and the disk to be easily engaged about the strap and adjusted thereto, it being noted that the inner diameter of the annulus 12 is slightly greater than the width of the strap so that the annulus does not have any effect upon 'the rotation or oscillation ot the strap.

1t is thought the action of the device will be readily understood from the foregoing description, taken in connection with the accompanying drawing.v lVlien the plunger of the pressvmoves downwardly, the engagement of the slot 20 in the disk 19 with the spiral twisted portion of the strap will rotate the strap so that the blade 11 will be swung outwardly and, consequently, will push the hands oit the operator away from the path of the plunger. The lower straight flatl portion of the strap 9 permits the plunger to Ydescend and' perform its work without imparting further rotation to the strap and the blade and upon the reverse movement of the plunger the blade will remain atrest until the plunger has cleared the work and the die, whereupon the disk 19 will again engage the spiral 10 and impart a reverse oscillation to the strap and the blade which will thereupon sweep the nished work from the lower die. The inter val between the completion of the up stroke of the plunger and the beginning of a second down stroke is utilized by the workmen to place a second blank in position to be actedV upon by the machine, and permit return of the blade to a point in front of the lower die so tliatthe blankmay be'placed behind the blade. The blade, however, will continue to move forwardly so that, if the commodate it, and it will operate entirely v automatically with the machine and will serve to eiliciently guard against injury to the operators hands and relieve'thef-opera tor of the necessity Vof removing the finished work. The construction of the supporting standard, the attaching arm and the parts for imparting oscillation ot the blade is such that they may be very easily and readily adjusted to the requirements of any particular machine. j

Having thus describedthe invention, l claim: j

*1. A device'for the purpose set forth comprising a support, a vertically disposed strap having its ends fitted pivotally in the support, the greater lower portion of Athe said strap being fiat and straight andthe upper portion of the strap having a spiral twist therein, a vertically adjustable arm construct-ed to be attached to a working part of a machine and encircling the strap, and a member carried by said arm and provided with a slot, the walls of which engage the sides of the twisted portion of the strap whereby reciprocation of said arm will oscillate the strap.

2. A device for the purpose set forth comprising a support, a flat strap 'disposed verticallyV and having its ends pivotally 'en`- gaged in the support, the strap beingprovided with a spiral twist in its upper portion, a. blade extending laterally from the lower end of the strap, an arm to be secured to the working part of a machine and having an annulus encirclingthe strap, and an actuating disk secured'upon the annulus and rotatably adjustable thereon with respect to Y the strap, the said disk having a diametrical' `slot fitting closely to the sides of the strap 

